42

One of the greatest benefits of MRI scans is their safety. Unlike PET, X-ray, CT and most other scans, MRIs use the properties of body tissues in magnetic fields to produce an image. The MRI machine produces a powerful magnetic field which interacts with body tissues to produce radio waves, which are in turn interpreted by a computer to determine the ...


5

If you are going to have a Magnetic Resonance Neurography (MRN), also known as MR Imaging of Peripheral Nerves (PNI) (UCSF), a doctor will likely tell you in advance, at least because the investigation may not be covered by your insurance (Neurography Institute). The MRI and MRN procedures are similar, only that MRN requires more powerful scanners that are ...


5

Have a look at this publication of Sein et al., 'Reliability of MRI assessment of supraspinatus tendinopathy.' (PMID 17289860) Sein ML et al. Reliability of MRI assessment of supraspinatus tendinopathy. Br J Sports Med. 2007 Aug;41(8):e9. Epub 2007 Feb 8. https://dx.doi.org/10.1136%2Fbjsm.2006.034421


5

In general, a CT scan of an organ is intended to check only that organ, not the entire body region, even if some other organs are seen on the image. A CT of one organ can accidentally reveal a disorder in some other organ, though. Below is a CT image of the kidneys that reveals tumors (red arrows) in both kidneys. The image also shows parts of some other ...


5

There are no units for MRI intensity. A Comparison of Five Methods for Signal Intensity Standardization in MRI (CEUR-WS.org): A major problem in magnetic resonance imaging (MRI) is the lack of a pulse sequence dependent standardized intensity scale like the Hounsfield units in computed tomography. MRI sequences (Radiopedia): When describing most ...


5

Commonly used diagnostic imaging methods are: Ultrasonography X-ray Computed tomography (CT) Magnetic resonance imaging (MRI) Scintigraphy or radionuclide scan (injecting a radioactive tracer into a vein, waiting until it collects in a certain organ, for example, the thyroid gland, and taking a picture of the tracer distribution with a scanner) All the ...


5

The pictures you posted are simply light microscopy of tissue (and prepared quite well). For a source, just look at the illustrations to Wikipedia's histopathology article and see for yourself what this type of picture looks like. Even if you could get a non-invasive imaging from a patient with that resolution (and I don't know of any which can do that, not ...


4

Here are some resources and books you can use but before that check out FDA ,radiologyeducation.com, virginia.edu , emory.edu and sprawls.org i think they can pretty much give you the information you want. For fundamental information and physic of radiography ( which i think is the answer to your question) : Principles of Radiographic Imaging: An Art and a ...


4

There is no consistency within the industry on the terminology. For example, GE calls them MR systems, Philips calls them both MR system and MRI system, Toshiba calls them both MRI system and MR system, and Siemens calls them MRI scanners.


3

“Acquisition in a single volume” means an image obtained by a single rotation of a scanner ("single gantry rotation"). It covers up to 16 cm of the body. "Wide volume imaging" includes repeated single volume imaging of adjacent areas and then combining them into a single image. So, two volumes would cover up to 32 cm, three volumes up to 48 cm, etc. Source:...


3

There are some evidences to prove that ultrasound is subjective, as there are chances of it giving false positive results as the interpretation may vary from one evaluator to the other. the interpretation can vary on the evaluator. There is also a higher incidence of incorrectly identifying a mass as cancerous, a false positive.. Reference Preliminary data ...


3

Take a look at the IHE Radiology Scheduled Workflow integration profile in IHE Radiology (RAD) Technical Framework. This explains a common workflow model.


3

Magnetic Resonance Imaging is an umbrella term for any medical imaging technique that makes use of the phenomenon of nuclear magnetic resonance. There are many variants depending on how the scanner is configured and analysed, but all are considered MRI. The basis for the different types of MRI scanning Much of the following is adapted from MRI Basics. ...


2

I think it is mainly due to the evidence indicating poor accuracy (sensitivity and specificity) of conventional MRI. It means that false-positive or false-negative findings may be detected in MRI of elbow (1): MR arthrography is more accurate than conventional MRI of the elbow at 3 T. [In 54 out of 79 patients, the diagnoses made on MRI and MR ...


2

Fetal gender determination is suprisingly accurate, according to this study: Accuracy of sonographic fetal gender determination: predictions made by sonographers during routine obstetric ultrasound scans The results state the following: Results confirmed 100% accuracy in predictions made after 14 weeks gestation. The overall success rate in the first ...


2

Magnetic-resonance.org World­wide, there are approximately 36,000 MR machines. At present, about 2,500 MR imaging units are sold worldwide every year This CDC link shows the amount per country. If you take this to be a good reference then this could be answer.


1

As with anything, it depends. As a surgeon who often covers trauma call, I will accompany my sick and traumatically injured patients to the CT scanner from the emergency room. Often times, in the setting of trauma, the injuries I am looking for are obvious immediately (such as a subdural hematoma or a large liver laceration). As soon as I see these images on ...


1

X-rays are ionizing radiation, so they introduce a small risk of harm such as cancer. The risk is negligible at the individual level, especially compared with the benefit of imaging when you're sick. Ultrasound is a form of sound, so it's not ionizing radiation. High intensities of ultrasound can be used to intentionally break up tissue (therapeutic ...


1

I don't know about official Chinese recommendations, but this might help. China had experience with SARS, and this new infection was looking a lot like SARS. They did not have a surfeit of testing kits for a new virus, but they knew what SARS looked like on CT scans. Therefore, symptomatic patients received CT scans of the chest before being tested for ...


1

Pisiform fractures like scaphoid fractures can be tricky to identify, and this is a good example of why! Even though I don't have a definitive yes/no answer, I wanted to answer this question as it is a good professional learning question for this site. I agree that in this case, although the feature suggesting it might be artifact (the alignment of the ...


1

I called the radiology office and the technician I talked with said that the numbers should denote the series and frame in which the (in this case) lesions can be found. He said that these numbers would normally be accompanied with markup such as "series 14, image 8" or the like and that this abbreviated form is non-standard. So for "14/8" I needed to go to ...


1

I would like to make a recommendation, as a researcher also working in medical imaging. You state that you are interested in predicting lesion diameter, patient gender, and patient age from the scans. However, when a radiologist reads a scan, they already know the patient gender and the patient age because that information is in the medical record. They also ...


1

I would say no, because Sievert is defined as Joule/kg (https://en.wikipedia.org/wiki/Sievert). I cannot find the patient weight or mass irradiated in the provided data.


Only top voted, non community-wiki answers of a minimum length are eligible